# Unable to add DICOM data

**URL:** <https://discourse.slicer.org/t/unable-to-add-dicom-data/46156>\
**Category:** Support\
**Created:** [February 14, 2026, 4:24am UTC](https://discourse.slicer.org/t/unable-to-add-dicom-data/46156 "2026-02-14T04:24:37Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Akash\_Raj\_G\_P](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/akash_raj_g_p/32/79622_2.png) [@Akash\_Raj\_G\_P](https://discourse.slicer.org/u/Akash_Raj_G_P)\
**Post date:** [February 14, 2026, 4:24am UTC](https://discourse.slicer.org/t/unable-to-add-dicom-data/46156/1 "2026-02-14T04:24:37Z")

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When I click on the ‘Add DICOM data’ button on the homepage I get an error message that says ‘Unfortunately this requested module is not available in this Slicer session‘. I have not seen this error occur for anybody else, and I’m working on a Macbook Air. I don’t have a DICOM data option in the Welcome to Slicer drop-down menu either. I have installed the DCMQI and DICOMwebbrowser extensions although I don’t think that should matter. Everybody I work with followed the same instructions, so I believe it is either an installation/laptop hardware issue. How can I resolve this?

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**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [February 14, 2026, 4:49am UTC](https://discourse.slicer.org/t/unable-to-add-dicom-data/46156/2 "2026-02-14T04:49:41Z")

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It means that Python is not available, most likely because there was an error during application startup. You can get a hint about what module or extension causes it in the application log (the first error message is the most relevant, all the subsequent ones may be a consequence of the first one).

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**Author:** ![pieper](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/pieper/32/8_2.png) [@pieper](https://discourse.slicer.org/u/pieper)\
**Post date:** [February 14, 2026, 3:38pm UTC](https://discourse.slicer.org/t/unable-to-add-dicom-data/46156/3 "2026-02-14T15:38:56Z")

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Or if you built from source on mac silicon using the current draft dicom support is currently broken. I’m sure it’s fixable but nobody has has a chance to look into it yet.

For now, use the standard x86 builds on mac silicon. They work fine.